<template>
  <div class="cartcontrol">
    <transition name="move">
      <div class="cart-decrease" v-show="food.count > 0" @click="decreaseCart">
        <span class="inner icon-remove_circle_outline"></span>
      </div>
    </transition>
    <div class="cart-count" v-show="food.count > 0">{{food.count}}</div>
    <div class="cart-add icon-add_circle" @click="addCart($event)"></div>
  </div>
</template>

<script type="text/ecmascript-6">
  import Vue from'vue';

  export default {
    props: {
      food: {
        type: Object
      }
    },
    created() {
    },
    methods: {
      addCart(event) {
        if (!event._constructed) {
          //防止网页，两次点击
          return;
        }
         if (!this.food.count) {
            //  给food增加count属性
           Vue.set(this.food, 'count', 1);
         } else {
           this.food.count ++;
         }
      },
      decreaseCart(event) {
        if (!event._constructed) {
          //防止网页，两次点击
          return;
        }
        if (this.food.count) {
          this.food.count --;
        }
      }
    }
  }
</script>

<style lang="stylus" rel="stylesheet/stylus">
  .cartcontrol
    font-size: 0
    .cart-decrease
      display: inline-block
      padding: 6px
      .inner
        font-size: 24px
        line-height: 24px
        color: rgb(0, 160, 220)
    .cart-count
      display: inline-block
      font-size: 10px
      vertical-align: top
      width: 12px
      padding-top: 6px
      line-height: 24px
      text-align: center
      color: rgb(147, 153, 159)
    .cart-add
      display: inline-block
      padding: 6px
      font-size: 24px
      line-height: 24px
      color: rgb(0, 160, 220)

</style>
